323220321 has 16 divisors (see below), whose sum is σ = 484228800. Its totient is φ = 213057504.

The previous prime is 323220319. The next prime is 323220413. The reversal of 323220321 is 123022323.

It is a happy number.

323220321 is a `hidden beast` number, since 323 + 2 + 20 + 321 = 666.

It is not a de Polignac number, because 323220321 - 2¹ = 323220319 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 323220294 and 323220303.

It is not an unprimeable number, because it can be changed into a prime (323221321) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 64851 + ... + 69656.

It is an arithmetic number, because the mean of its divisors is an integer number (30264300).

Almost surely, 2^323220321 is an apocalyptic number.

It is an amenable number.

323220321 is a deficient number, since it is larger than the sum of its proper divisors (161008479).

323220321 is a wasteful number, since it uses less digits than its factorization.

323220321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134605 (or 134599 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 18.

The square root of 323220321 is about 17978.3292049067. The cubic root of 323220321 is about 686.2771711300.

Adding to 323220321 its reverse (123022323), we get a palindrome (446242644).

The spelling of 323220321 in words is "three hundred twenty-three million, two hundred twenty thousand, three hundred twenty-one".